Car-coupling



P. J. DOGKRAY.

GAR COUPLING- (No Model Patented Feb. 27, 1394.

UNITED STATES PATENT @rrics,

PETER J. DOCKRAY, OF KEARNEY, NEW JERSEY.

CAR-COUPLING.

SPECIFICATION forming part of Letters Patent No. 515,487, dated February27, 1 894.

Applicationfiled August 14, 1893. Serial No.483,089. (No model.)

To ztZZ whom it may concern:

Beitknown thatLPETER J.DooKRAY,acitizen of the United States, residingat Kearney, in the county of Hudson and State of New Jersey, haveinvented certain new and useful Improvements in Gar-Couplings; and I dodeclare the following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same, reference being had to theaccompanyingdrawings, and to the letters of reference marked thereon,which form a part of this specification.

The special object of the invention is to make some improvements uponwhat is generally known as the M. O. B. or master carbuilders coupling.

Figure l of the drawings is a plan View of two drawheads coupledtogether; Fig. 2 avertical section on the dotted line x as of Fig. 1;Fig. 3 a bottom plan view, and Figs. 4, 5, 6, and 7, detail viewsrespectively of the pin, the crank shaft, the hearing plate and theclutch.

In the drawings, A represents the drawhead which is preferably cast inone piece and provided with the vertical pin hole ct set in a positionto take the strain, in pulling, ofi pivot pin. This hole, as well as thepin, is oblong in form so that the pin B may not turn therein.

0 is the clutch having a vertical oval hole a through which passes apivot c that also passes through the upper and lower round holes a'o/ ofthe drawhead. The clutch may however have a round and the drawhead ovalholes. The clutch has also an arc-arm c on a radial shank o and providedwith a cam c on the end of its convex face. The clutch turns in theusual manner on its pivot and is locked by dropping the pin in front ofthe arc-arm.

On the inside of the drawhead, is formeda shoulder a which engages thecam 0 to take the strain in pushing off pivot-pin, the oval holeallowing this. The weight of the droppin on the arc-arm prevents theclutch from turning outwardly too far and holds it just where it will bestruck by the entering clutch of another drawhead.

The pin B has, at the top, a hole I) to receive two chains, one from thetop of the car and another from across-rod with handles on each side ofthe car. Just below the hole I) is a flange b to prevent the pin frompassing too far downward, and near the middle a notch or open slot bthrough which passes the arc-arm c on its inward and outward movement.The pin has also a slot 5 with a shoulder b 0n the inside of the slot,and in this slot 72 is arranged the crank shaft 1) which turns inbearings on the plate E. This shaft has an arm d which passes throughthe drawhead slot a and is operated by the cam c on the arc-arm. Thecrank shaft engages the shoulder 12 to hold the pin up and allow theclutch (l to open.

The bearing-plate E has a square hole 6 into which fits the rigid stud Fon the drawhead and is held down by the cross-pin G.

The master car builders coupling is liable V to have its pivot-pinbroken at the pivot-holes,

which objection I have overcome by the oval hole in clutch. When theclutch is locked, it is just as firm without the pin as with it,inasmuch as the stud or cam c bears against the drawhead shoulder awhile the back of shank rests against the inner wall of the drawhead,thus taking the push-strain effectually. The strainin pulling is takenoff because theback of clutch-shank bears against the inner wall of thedrawhead while the front thereof bears against the pin and the arc-armagainst the inner wall of the horizontal hole, the oval hole in theclutch permitting this, thus allowing smaller pivot pins and holes so asto increase the strength of the clutch at its weakest point. The longarm d of the crankshaft which projects into the drawhead slot 06* and isacted upon by the arc-cam c renders unnecessary any weighted lever and,being under the drawhead is out of the way of every thing, including iceand snow. When the clutch is open wide, the crank-shaft drops the lockpin B on the arc-arm C so as to hold it open.

What I claim as new, and desire to protect by Letters Patent, is

1. A clutch G having an oval hole for the pivot pin and a cam c on theend of its convex 4. The clutch 0 having the earn 0 on its arc-arn1, thedrawhead having the slot a and the crank shaft D having an armdprojeeting 15 through said slot as and for the purpose specifled.

In testimony whereof I aflix my signature in presence of two witnesses.

PETER J. DOCKRAY.

WVitnesses:

GEO. H. GREASON, WILBUR F. SMITH.

